Commit a21d38c8 authored Mar 24, 2015 by Len Brown

tools/power turbostat: modprobe msr, if needed



Some distros (Ubuntu) ship the msr driver as a module.
If turbosat is run as root on those systems, and discovers
that there is no /dev/cpu/cpu0/msr, it will now "modprobe msr"
for the user.

If not root, the modprobe attempt will fail, and turbostat will exit as before:

turbostat: no /dev/cpu/0/msr, Try "# modprobe msr" : No such file or directory

Signed-off-by: Len Brown <len.brown@intel.com>

parent fcd17211

tools/power/x86/turbostat/turbostat.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -1528,6 +1528,7 @@ void check_dev_msr()
		struct stat sb;

		if (stat("/dev/cpu/0/msr", &sb))
		if (system("/sbin/modprobe msr > /dev/null 2>&1"))
		err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
		}

		@@ -2713,7 +2714,7 @@ int get_and_dump_counters(void)
		}

		void print_version() {
		fprintf(stderr, "turbostat version 4.2 23 Mar, 2015"
		fprintf(stderr, "turbostat version 4.3 24 Mar, 2015"
		" - Len Brown <lenb@kernel.org>\n");
		}